Small cross post from the Dutch language community.
Yesterday I connected my new Arc Ultra. First I separated the Sub (gen 2), the One and One SL that form the surrounds from the Beam (gen 1), then I renamed the Beam and disconnected it. Connected the Arc Ultra and put it on wifi (other devices are connected to a Boost). Sub and One (SL) reconnected. Did the advanced Trueplay. Connected the Ace, added Google Assistant - that appears to work on the One that serves as a surround. That's a gift - it used to work that way with a Playbar, but I hadn't read anywhere that it would work with the Arc Ultra. The Nest Mini that I already purchased can therefore be returned. The set up went smoothly.
First experiences. Wow. Sound is clearer. Tried a bit of Dune 2 (see https://www.whathifi.com/features/the-best-dolby-atmos-movie-scenes) for Atmos. Had to go back into the settings of the Samsung TV, but it works. Atmos sounds good, even with my non-Atmos rear speakers. Music from Blu Ray sounds great too!